WO2018030422A2 - Diagnosis device, learning device, and diagnosis system - Google Patents

Diagnosis device, learning device, and diagnosis system Download PDF

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Publication number
WO2018030422A2
WO2018030422A2 PCT/JP2017/028808 JP2017028808W WO2018030422A2 WO 2018030422 A2 WO2018030422 A2 WO 2018030422A2 JP 2017028808 W JP2017028808 W JP 2017028808W WO 2018030422 A2 WO2018030422 A2 WO 2018030422A2
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WO
WIPO (PCT)
Prior art keywords
unit
context information
piece
model
information
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PCT/JP2017/028808
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English (en)
French (fr)
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WO2018030422A3 (en
WO2018030422A4 (en
Inventor
Masaru Kuroda
Keishi Iwata
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Ricoh Company, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Ricoh Company, Ltd. filed Critical Ricoh Company, Ltd.
Priority to US16/321,892 priority Critical patent/US11415976B2/en
Priority to EP17762226.3A priority patent/EP3497528B1/en
Priority to CN201780048541.3A priority patent/CN109564425B/zh
Publication of WO2018030422A2 publication Critical patent/WO2018030422A2/en
Publication of WO2018030422A3 publication Critical patent/WO2018030422A3/en
Publication of WO2018030422A4 publication Critical patent/WO2018030422A4/en

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
    • G05B23/0243—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults model based detection method, e.g. first-principles knowledge model
    • G05B23/0254—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults model based detection method, e.g. first-principles knowledge model based on a quantitative model, e.g. mathematical relationships between inputs and outputs; functions: observer, Kalman filter, residual calculation, Neural Networks
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
    • G06N20/00—Machine learning
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/32—Operator till task planning
    • G05B2219/32356—For diagnostics

Definitions

  • a diagnosis device includes a first acquiring unit, a second acquiring unit, a first transmitting unit, a second transmitting unit, a third acquiring unit, and a first determining unit.
  • the first acquiring unit is configured to acquire, from a target device, a piece of context information corresponding to a current operation among a plurality of pieces of context information determined for respective kinds of operations performed by the target device.
  • the second acquiring unit is configured to acquire a piece of detection information output from a detecting unit that detects a physical quantity that changes according to operations performed by the target device.
  • the first transmitting unit is configured to transmit the piece of the context information acquired by the first acquiring unit to a learning device.
  • the detecting unit 211 is a functional unit that detects a physical quantity, such as vibrations or sounds, generated by a tool, such as a drill, an end mill, a bit tip, or a grinding stone, mounted in the processing machine 200, and outputs information on the detected physical quantity as the detection information (the sensor data) to the diagnosis device 100.
  • the detecting unit 211 is implemented by the sensor 57 illustrated in Fig. 2. It may be possible to provide an arbitrary number of the detecting units 211. For example, it may be possible to provide a plurality of the detecting units 211 that detect the same physical quantity, or provide a plurality of the detecting units 211 that detect different physical quantities.
  • the processing information acquiring unit 303 is a functional unit that acquires the context information (the processing information) from the diagnosis device 100 via the receiving unit 301b.
  • the processing information acquiring unit 303 is implemented by, for example, a program executed by the CPU 61 illustrated in Fig. 3.
  • FIG. 7 is a schematic diagram for explaining a detailed example of the model generation process and the diagnosis process in the first embodiment.
  • a context information string 901 in Fig. 9 indicates that a processing process includes operations of driving four motors (a motor X, a motor Y, a motor Z, and the motor B).
  • the motor B is used in this processing process in common with the processing process illustrated in Fig. 7, for example. Therefore, even in the processing process in Fig. 9, the determining unit 106 can perform the diagnosis process by using the same model "motor B" stored in the storage unit 309 of the learning device 300 and a detection information string 921.
  • the model combination process is performed at Steps S301 to S303 as described above, and a corresponding model is transmitted to the diagnosis device 100 in response to a request from the diagnosis device 100 at Step S304.
  • Step S404 The determining unit 306 of the learning device 300 determines whether it is necessary to acquire the detection information corresponding to the context information acquired by the processing information acquiring unit 303 and to generate or combine a model, on the basis of the context information acquired by the processing information acquiring unit 303 and the context information stored in the storage unit 309 (for example, the context information (the "machine tool No.”, the "processing device identification information", and the “processing condition") associated with the feature information and the model in the table illustrated in Fig. 12).
  • the context information the "machine tool No.”, the "processing device identification information", and the "processing condition
  • Fig. 14 is a schematic diagram illustrating an example of a functional block configuration of the diagnosis system according to the second embodiment.
  • Fig. 15 is a schematic diagram for explaining an example of encryption in the second embodiment.
  • Fig. 16 is a schematic diagram for explaining another example of encryption in the second embodiment.
  • Fig. 17 is a schematic diagram for explaining a still another example of encryption in the second embodiment.
  • Fig. 18 is a schematic diagram illustrating an example of a screen for setting a combination of elements of context information.
  • the hashing unit 108 may perform hashing on each of elements of the context information (a "rotational frequency 200 Hz", the "motor A is driven”, a “machine tool Type A”, and a “process on aluminum tube of 20 cm") and obtain hash values. In this case, it becomes possible to categorize each of the hash values of the elements, and associate the categories with the detection information.
  • the hashing unit 108 may collectively perform hashing on pieces of the context information and obtain a single hash value.
  • the hashing unit 108 may perform hashing for each of specific combinations of the elements of the context information and obtain hash values. In this case, it becomes possible to categorize each of the combinations of the elements of the context information that may be used, and associate the categories with the detection information.
  • a setting screen as illustrated in Fig. 18 It may also be possible to allow an administrator to set a specific combination of elements of the context information as illustrated in Fig. 17 described above by using a setting screen as illustrated in Fig. 18.
  • the display control unit 110 to be described later displays the setting screen as illustrated in Fig. 18 on the display unit 111 in response to an operation on the input unit 112 to allow the administrator to freely select a combination of elements of the context information by a selection operation using the input unit 112.
  • Fig. 18 the display control unit 110 to be described later displays the setting screen as illustrated in Fig. 18 on the display unit 111 in response to an operation on the input unit 112 to allow the administrator to freely select a combination of elements of the context information by a selection operation using the input unit 112.
  • the determining unit 106 is a functional unit that determines whether the operation performed by the processing machine 200 is normal, by using the feature information extracted by the feature extracting unit 104 and by using the model that corresponds to the context information hashed by the hashing unit 108 and that is acquired by the model acquiring unit 105. For example, the determining unit 106 requests the feature extracting unit 104 to extract the feature information from the detection information encrypted by the encrypting unit 109. The determining unit 106 calculates a likelihood indicating the degree of likelihood that the feature information extracted from the encrypted detection information is normal, by using a corresponding model.
  • the hashing unit 108 performs hashing to obtain a hash value by applying a hash function to the context information acquired by the processing information acquiring unit 103 (Step S503).
  • the hashing unit 108 may obtain a plurality of the hash values from the context information depending on conditions. The method of obtaining the hash value is as described above.
  • the detection information acquiring unit 302a of the learning device 300a acquires the encrypted detection information transmitted from the diagnosis device 100a (the detection information receiving unit 102) via the receiving unit 301b.
  • the detection information acquiring unit 302a associates the acquired encrypted detection information (the sensor data) with the hashed context information (the hash value) as in the table illustrated in Fig. 20 for example, and stores the detection information in the storage unit 309.
  • Fig. 23 is a flowchart illustrating an example of the diagnosis process in the second embodiment. With reference to Fig. 23, the diagnosis process performed by the diagnosis system in the second embodiment will be described.
  • the numerical control unit 201 of the processing machine 200 sequentially transmits the context information indicating a current operation to the diagnosis device 100a.
  • the first receiving unit 101a receives the context information transmitted from the processing machine 200 as described above (Step S701).
  • the processing information acquiring unit 103 acquires the context information received by the first receiving unit 101a.
  • a diagnosis device 100b includes the communication control unit 101, the detection information receiving unit 102 (the second acquiring unit), the processing information acquiring unit 103 (the first acquiring unit), the feature extracting unit 104, a model acquiring unit 105a (a third acquiring unit), a determining unit 106a (a first determining unit), and the storage unit 107.
  • the program executed by the diagnosis device and the learning device in the embodiments and the modifications as described above may be stored in a computer connected to a network, such as the Internet, and provided by being downloaded via the network.
  • the program executed by the diagnosis device and the learning device in the embodiments and the modifications as described above may be provided or distributed via a network, such as the Internet.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Evolutionary Computation (AREA)
  • Mathematical Physics (AREA)
  • Automation & Control Theory (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Data Mining & Analysis (AREA)
  • Medical Informatics (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Testing And Monitoring For Control Systems (AREA)
PCT/JP2017/028808 2016-08-09 2017-08-08 Diagnosis device, learning device, and diagnosis system WO2018030422A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US16/321,892 US11415976B2 (en) 2016-08-09 2017-08-08 Diagnosis device, learning device, and diagnosis system
EP17762226.3A EP3497528B1 (en) 2016-08-09 2017-08-08 Diagnosis device, learning device, and diagnosis system
CN201780048541.3A CN109564425B (zh) 2016-08-09 2017-08-08 诊断设备、学习设备和诊断系统

Applications Claiming Priority (2)

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JP2016156940A JP6840953B2 (ja) 2016-08-09 2016-08-09 診断装置、学習装置および診断システム
JP2016-156940 2016-08-09

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WO2018030422A2 true WO2018030422A2 (en) 2018-02-15
WO2018030422A3 WO2018030422A3 (en) 2018-04-19
WO2018030422A4 WO2018030422A4 (en) 2018-06-14

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US (1) US11415976B2 (zh)
EP (1) EP3497528B1 (zh)
JP (1) JP6840953B2 (zh)
CN (1) CN109564425B (zh)
WO (1) WO2018030422A2 (zh)

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WO2020127512A1 (de) * 2018-12-21 2020-06-25 Mhp Management- Und It-Beratung Gmbh Überprüfungssystem und verfahren zum überprüfen von arbeitsabläufen
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WO2018030422A3 (en) 2018-04-19
WO2018030422A4 (en) 2018-06-14
JP2018025945A (ja) 2018-02-15
US11415976B2 (en) 2022-08-16
EP3497528B1 (en) 2020-01-08
CN109564425A (zh) 2019-04-02
JP6840953B2 (ja) 2021-03-10
US20190179297A1 (en) 2019-06-13
EP3497528A2 (en) 2019-06-19
CN109564425B (zh) 2021-10-08

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